Nanni N4.40, Workshop Manual

Page: 137 / 175

ENGINE
03-M-E3B, 03-M-DI-E3B, 03-M-E3BG, WSM
1-S67
Piston Ring and Connecting Rod
[D1503-M, D1703-M, D1803-M, V2003-M, V2203-M, V2403-M,
V2403-M-T, D1703-M-BG, V2003-M-BG, V2003-M-T-BG,
V2203-M-BG, V2403-M-BG]
1. Remove the piston rings (1), (2) and (3) with a piston ring tool.
2. Remove the piston pin (9) to disconnect the connecting rod (7)
from the piston (6).
(When reassembling)
• When you install the rings to the piston (6), set the manufacturer
mark (12) upward.
• When you install the oil ring (3) on the piston (6), set the
expander joint (10) on the opposite side of the oil ring gap (11).
• Apply engine oil to the piston pin (9).
• Put the piston (6) fully in 80 °C (176 °F) oil for 10 to 15 minutes.
• Align the mark (8) on the connecting rod (7) to the fan-shaped
concave (5). Then install the piston pin (9) to connect the
connecting rod (7) and the piston (6).
NOTE
• Put a mark on the connecting rod (7) and the piston (6) with
the same number to keep the same combination.
M00000003ENS0097US1
(1) Top Ring
(2) Second Ring
(3) Oil Ring
(4) Piston Pin Snap Ring
(5) Fan-Shaped Concave
(6) Piston (7) Connecting Rod
(8) Mark
(9) Piston Pin
(10) Expander Joint
(11) Oil Ring Gap
(12) Manufacturer Mark
KiSC issued 06, 2009 A